Apr 23, 2013 1:40am PDT
afford an attorney, he replied no. among the charges, 19-year-old suspect, dzhokhar tsarnaev faces one count of using a weapon of mass destruction. which carries a potential maximum sentence of death. we've learned despite the injury to his neck, he is cooperating with investigators, writing his answers to at least some of their questions. sources tell abc news, among the details he has provided is that he and his brother learned how to make bombs from the internet. >> it was his brother, the primary motivating force for him to become radicalized. why did they end up doing what they did on that day? >> reporter: much of the investigation is still focused on his deceased 26-year-old brother tamerlan. examining his life, his recent trip back to russia, as some question if the fbi did enough to monitor him after they questioned him two years ago. >> they investigated it thoroughly and did not find terrorist activity domestic or foreign. >> reporter: the street where two bombs killed three people and injured more than 200 others is handed over from the fbi to the city of boston for the ong
Apr 22, 2013 3:00am PDT
as radical gets. >>steve: have you seen this? the dramatic video of police closing in on dzhokhar tsarnaev? they used an infrared thermal imaging camera to pinpoint his exact location and movements inside the boat. >>brian: joining us with more on this technology taken from above, anna kooiman. >> good morning. they are stunning, these images. they were taken while taking tsarnaev into custody. you can see in the video released by the massachusetts state police, the 19-year-old in the boat, that image you see there is his body highlighted to thermal imaging. police were able to monitor his every movement because of this technology. now watch this. those big black puffs, those are explosions believed to be the flash grenades police threw at him. the company that makes the thermal cameras said the equipment worked exactly how it was supposed to. >> i think it was a real win they could look through the cover and see him lying inside the technology has been around for decades, but as you can see it keeps getting better and better. flare has more than 100 cameras in law enforcement communities.